Dental investment materials are used to encase the wax designed for the lost wax casting technique. These materials are usually available as a powder that is mixed with water and then used to encase the wax design. These materials solidify and can withstand the heat of the casting furnace to hold the precise shape left behind when the wax is burned out. Different gypsums are designed for use with different dental alloys or other materials, so be sure to select the proper gypsum for the case at hand.
|  |  |  |  |  |
| Company | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation |
| Item | Beauty-Cast Gypsum Investment | PC 15 Phosphate Bonded Investment | Polyvest Refractory Die Material | ResinVest | X-20 Chrome Phosphate Investment |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | The proven standard for the Hygroscopic Technique. Also excellent for the High Heat Technique. | PC15 is a fine grained phosphate bonded investment for pressable ceramics. Its creamy consistency pours easily when investing and produces smooth | POLYVEST Refractory Die Material is formulated with a coefficient of thermal expansion to closely match today's newer porcelains. With its controlled | Designed for burning out printed or milled resin patterns for crowns, bridges, or frameworks, ResinVest is a fiber-reinforced material that resists | A vastly improved casting investment for making chrome partial denture frameworks. For casting any chrome partial alloy. Refractory Cast is hard, |
| Quantity | 144 - 75 g Package
144 - 50 g Package
24 - 50 g Package
11 kg (25 pounds) Carton | 25 - 100 g Package
100 - 100 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 24 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 100 g Package; 55 lbs. Carton | 22 kg (50 pounds) Carton
50 - 400 g Packages
25 kg (55 pounds) Carton
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle |
| Compressive Strength | Wet - 700 psi (5 MPa) | Wet - 500 psi (3.4 MPa) | Wet - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | 1,350 psi (9.2 MPa) | Wet - 2,500 psi (17 MPa) |
| Working Time | 3 minutes | 7 - 9 minutes | 2 minutes | 6 to 8 Minutes | 4 - 5 minutes |
| Set Time | 14.5 minutes | Not Available | Not Available | 30 Minutes Minimum | Not Available |
| Material Type | Gypsum Casting Investment | Fine Grain Phosphate Bonded Investment | Refractory Die Material | Phosphate Investment | Phosphate Bonded |
| Indication For Use | Low Fusing Crown and Bridge Alloys | Pressable Ceramics | Refractory Investment - Direct Firing Ceramics | Burning out milled or printed resin patterns | Casting Partials with Chromium Dental Alloys |
| Liquid / Powder Ratio | 30 mL/100 g | 27 mL / 100 g | 22 mL / 100 g | 22 ml/100 g | 11 mL / 100 g |
| Setting Expansion | 0.4 % | 1 % | 0.8 % | 1.6 Percent | 0.2 % |
| Ready For Burnout | 30 minutes | 15 minutes | Not Available | Yes | 30 - 60 minutes |
| Hygroscopic Expansion | 1.5 % | N / A | N / A | Not Available | N / A |
| Thermal Expansion | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 0.7 % | 500° C, 2nd firing - 0.65% | 0.65 Percent | 700 -- 1,000° C (1,300 -- 1,800° F) - 0.90 % |
| Metal or Ringless Technique | Metal Only | Metal or Ringless | N / A | Both | Metal or Ringless |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |